Source: linux Severity: important Dear Maintainer,
After upgrade linux kernel to 3.1x, I have to boot debian with nouveau disabled (by option "modprobe.blacklist=nouveau") from macbook5,2's efi, or the kernel will hang out during boot. If I boot without "quiet" option, the following log will be printed: [4.431703] ACPI Warning: \_SB_.PCI0.IXVE.IGPU._DSM: Argument #4 type mismatch - Found [Buffer], ACPI requires [Package] (20140424/nsarguments-95) [4.435790] ACPI: \_SB_.PCI0.IXVE.IGPU: failed to evaluate _DSM [4.437550] fb: switching to nouveaufb from simple and then my box freezes, and white stripes may garble its screen. It seems many other intel mac models with a geforce 9400m embedded in mcp79 chip set have similar problem too. If I disable efifb, nouveau can be loaded successfully, but consoles (ttys) cannot be set up. If I disable ACPI, nouveau can be loaded successfully and even X server seems works fine, but I have no usb hw available, including kb and touchpad, so I cannot do further examinations. If I boot from legacy BIOS emulation mode (by removing grub-efi and install grub-pc, then wait for timeout for each efi booting trial) ,the first two line of above log is printed too, but the last line not. And nouveau and X work fine, with ttys and most hardware OK, except the cpu, whose second cpu core is never brought up, which is not acceptable for me. According to https://bugs.freedesktop.org/show_bug.cgi?id=29171#c7 , it is because EFI leaves the display engine in a state we're not expecting. Do you know any workaround for this? -- System Information: Debian Release: jessie/sid APT prefers testing APT policy: (900, 'testing'), (500, 'testing-proposed-updates'), (500, 'unstable') Architecture: amd64 (x86_64) Kernel: Linux 3.16-2-amd64 (SMP w/2 CPU cores) Locale: LANG=zh_CN.utf8, LC_CTYPE=zh_CN.utf8 (charmap=UTF-8) Shell: /bin/sh linked to /bin/dash -- To UNSUBSCRIBE, email to debian-bugs-dist-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org
